1 files changed, 67 insertions, 0 deletions
diff --git a/src/runtime/cgo/asm_loong64.s b/src/runtime/cgo/asm_loong64.s
new file mode 100644
index 0000000..961a3dd
--- /dev/null
+++ b/src/runtime/cgo/asm_loong64.s
@@ -0,0 +1,67 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "textflag.h"
+
+// Called by C code generated by cmd/cgo.
+// func crosscall2(fn, a unsafe.Pointer, n int32, ctxt uintptr)
+// Saves C callee-saved registers and calls cgocallback with three arguments.
+// fn is the PC of a func(a unsafe.Pointer) function.
+TEXT crosscall2(SB),NOSPLIT|NOFRAME,$0
+	/*
+	 * We still need to save all callee save register as before, and then
+	 * push 3 args for fn (R4, R5, R7), skipping R6.
+	 * Also note that at procedure entry in gc world, 8(R29) will be the
+	 *  first arg.
+	 */
+
+	ADDV	$(-8*22), R3
+	MOVV	R4, (8*1)(R3) // fn unsafe.Pointer
+	MOVV	R5, (8*2)(R3) // a unsafe.Pointer
+	MOVV	R7, (8*3)(R3) // ctxt uintptr
+	MOVV	R23, (8*4)(R3)
+	MOVV	R24, (8*5)(R3)
+	MOVV	R25, (8*6)(R3)
+	MOVV	R26, (8*7)(R3)
+	MOVV	R27, (8*8)(R3)
+	MOVV	R28, (8*9)(R3)
+	MOVV	R29, (8*10)(R3)
+	MOVV	R30, (8*11)(R3)
+	MOVV	g, (8*12)(R3)
+	MOVV	R1, (8*13)(R3)
+	MOVD	F24, (8*14)(R3)
+	MOVD	F25, (8*15)(R3)
+	MOVD	F26, (8*16)(R3)
+	MOVD	F27, (8*17)(R3)
+	MOVD	F28, (8*18)(R3)
+	MOVD	F29, (8*19)(R3)
+	MOVD	F30, (8*20)(R3)
+	MOVD	F31, (8*21)(R3)
+
+	// Initialize Go ABI environment
+	JAL	runtime·load_g(SB)
+
+	JAL	runtime·cgocallback(SB)
+
+	MOVV	(8*4)(R3), R23
+	MOVV	(8*5)(R3), R24
+	MOVV	(8*6)(R3), R25
+	MOVV	(8*7)(R3), R26
+	MOVV	(8*8)(R3), R27
+	MOVV	(8*9)(R3), R28
+	MOVV	(8*10)(R3), R29
+	MOVV	(8*11)(R3), R30
+	MOVV	(8*12)(R3), g
+	MOVV	(8*13)(R3), R1
+	MOVD	(8*14)(R3), F24
+	MOVD	(8*15)(R3), F25
+	MOVD	(8*16)(R3), F26
+	MOVD	(8*17)(R3), F27
+	MOVD	(8*18)(R3), F28
+	MOVD	(8*19)(R3), F29
+	MOVD	(8*20)(R3), F30
+	MOVD	(8*21)(R3), F31
+	ADDV	$(8*22), R3
+
+	RET